Detect delimiter of csv file

code.php

/**
 * Class CsvHelpers
 * @package App\Services\Common
 */
class CsvHelpers
{
    /**
     * @param $file
     * @return string
     */
    public static function detectDelimiter($file)
    {
        $delimiters = [
            ';' => 0,
            ',' => 0,
            '\t' => 0,
            '|' => 0
        ];

        $handle = fopen($file, 'rb');
        $firstLine = fgets($handle);
        fclose($handle);
        foreach ($delimiters as $delimiter => &$count) {
            $count = \count(str_getcsv($firstLine, $delimiter));
        }

        return array_search(max($delimiters), $delimiters, true);
    }
}